广西苦苣苔科四种植物的染色体数目报道

Chromosome numbers of 4 species in the Gesneriaceae from Guangxi

首次报道了产于广西的苦苣苔科(Gesneriaceae)4属4种植物的染色体数目。其中,(1)单座苣苔属(Metabriggsia):单座苣苔(M.ovalifolia)的染色体数目2n=24;(2)异裂苣苔属(Pseudochirita):异裂苣苔(P.guangxiensis)的染色体数目为2n=28;(3)长蒴苣苔属(Didymocarpus):东南长蒴苣苔(D.hancei)的染色体数目为2n=20;(4)唇柱苣苔属(Chirita):弄岗唇柱苣苔(Ch.longgangensis)的染色体数目为2n=28。4种植物的染色体大多数为小型染色体。

In this paper,the chromosome numbers of 4 species in Gesneriaceae from Guangxi are reported for the first time. The results are formulated as follows: Metabriggsia ovali folia 2n = 24;Pseudochirita guangx-iensis 2n = 28; Didymocarpus hancei 2n = 20; Chirita longgangensis 2n = 28. The chromosomes of the four species are small in size.